private void button1_Click(object sender, EventArgs e)
{
PopupBox pb = new PopupBox();
DataTable dts = InvGroup.ListGroup();
pb.SetDataTable(dts);
pb.Show();
}
private void grouplbl_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
InvGroup gp = new InvGroup();
gp.ShowDialog();
}